The scleractinian corals live in Arctica and in high latitude of North Atlantic

Only two species of Scleractinian corals dwell Arctic ocean, to the west of Barents Sea: Lophelia pertusa (Linné, 1758) and Flabellum macandrewi (Gray,1849). The geographic distribution of the first of them is cosmopolitan, the next lives only in Atlantic ocean. Our analysis of hydrodynamics situation in which this species inhabit lead us to conclusion, that for corals L. pertusa, which dwell on the coarse ground, the high mobile water is favorable. The species Fl. macandrewi, which lives on loose deposit, also be under the sway of the influence of the power water flows, which break their fragile skeleton. But their uncommon capability for quick skeleton regeneration permit them adapt to that disturb situation. We state one opinion that the presence of corals Fl. macandrewi may be one marker of aggressive dynamical waters. In the central parts of North Atlantic the Scleractinian corals are completely absent. The cause of it consist in geological youth of this region, in higher percent of fresh water and also in intensive development of phytoplankton.